MAX1232CPA 微处理器监控器
发布时间:2008/5/28 0:00:00 访问次数:455
max1232cpa 微处理器监控电路
| 概述 |
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the max1232 microprocessor (µp) supervisory circuit provides µp housekeeping and power-supply supervision functions while consuming only 1/10th the power of the ds1232. the max1232 enhances circuit reliability in µp systems by monitoring the power supply, monitoring the software execution, and providing a debounced manual reset input. the max1232 is a plug-in upgrade of the dallas ds1232.
a reset pulse of at least 250ms duration is supplied on power-up, power-down, and low-voltage brownout conditions (5% or 10% supply tolerances can be selected digitally). also featured is a debounced manual reset input that forces the reset outputs to their active states for a minimum of 250ms. a digitally programmable watchdog timer monitors software execution and can be programmed for timeout settings of 150ms, 600ms, or 1.2s. the max1232 requires no external components. |
| 关键特性 |
|
应用 |
- consumes 1/10th the power of the ds1232
- precision voltage monitor—adjustable +4.5v or +4.75v
- power-ok/reset pulse width—250ms min
- no external components
- adjustable watchdog timer—150ms, 600ms, or 1.2s
- debounced manual reset input for external override
- available in 8-pin pdip/so and 16-pin wide so packages
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汽车系统
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计算机
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控制器
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高精度µp电源监视
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智能仪表
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| key specifications: microprocessor supervisors |
| part number |
number of monitored voltages |
reset threshold range (v) |
active-low reset output |
active-high reset output |
min. reset timeout range |
watchdog feature |
nom. watchdog timeout range |
supervisor features |
reset thresh. acc. (% at +25°c) |
max. icc (µa) |
package |
package type |
operating temp. range (°c) |
| max1232 |
1 |
3.3 to 5.5 |
max1232cpa 微处理器监控电路
| 概述 |
|
the max1232 microprocessor (µp) supervisory circuit provides µp housekeeping and power-supply supervision functions while consuming only 1/10th the power of the ds1232. the max1232 enhances circuit reliability in µp systems by monitoring the power supply, monitoring the software execution, and providing a debounced manual reset input. the max1232 is a plug-in upgrade of the dallas ds1232.
a reset pulse of at least 250ms duration is supplied on power-up, power-down, and low-voltage brownout conditions (5% or 10% supply tolerances can be selected digitally). also featured is a debounced manual reset input that forces the reset outputs to their active states for a minimum of 250ms. a digitally programmable watchdog timer monitors software execution and can be programmed for timeout settings of 150ms, 600ms, or 1.2s. the max1232 requires no external components. |
| 关键特性 |
|
应用 |
- consumes 1/10th the power of the ds1232
- precision voltage monitor—adjustable +4.5v or +4.75v
- power-ok/reset pulse width—250ms min
- no external components
- adjustable watchdog timer—150ms, 600ms, or 1.2s
- debounced manual reset input for external override
- available in 8-pin pdip/so and 16-pin wide so packages
|
|
|
|
|
汽车系统
|
|
|
计算机
|
|
|
控制器
|
|
|
高精度µp电源监视
|
|
|
智能仪表
| |
|
| key specifications: microprocessor supervisors |
| part number |
number of monitored voltages |
reset threshold range (v) |
active-low reset output |
active-high reset output |
min. reset timeout range |
watchdog feature |
nom. watchdog timeout range |
supervisor features |
reset thresh. acc. (% at +25°c) |
max. icc (µa) |
package |
package type |
operating temp. range (°c) |
| max1232 |
1 |
3.3 to 5.5 |
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